Mesonephric-like adenocarcinoma of the ovary: a case study.

Mesonephric-like adenocarcinoma (MLA) is a rare and newly recognized subtype of ovarian and endometrial carcinomas, introduced in the 2020 World Health Organization Classification. This tumor likely originates from Müllerian-derived tissues and often mimics more common ovarian cancers, leading to frequent misdiagnosis. This case study details a 36-year-old woman who presented with urinary symptoms following a hysterectomy. Imaging revealed a significant left ovarian mass, initially misdiagnosed as carcinosarcoma. Pathological evaluation ultimately confirmed MLA, characterized by diverse architectural patterns and specific immunohistochemical markers. The patient underwent chemotherapy due to the locally advanced disease. This case highlights the diagnostic challenges of MLA and emphasizes the need for awareness among clinicians to prevent misdiagnosis. Given its aggressive nature and tendency to early recurrence, further research is essential for establishing standardized diagnostic criteria and treatment protocols for this rare malignancy.